VelocityUtil.java |
1 /** 2 * Copyright (c) 2000-2009 Liferay, Inc. All rights reserved. 3 * 4 * 5 * 6 * 7 * The contents of this file are subject to the terms of the Liferay Enterprise 8 * Subscription License ("License"). You may not use this file except in 9 * compliance with the License. You can obtain a copy of the License by 10 * contacting Liferay, Inc. See the License for the specific language governing 11 * permissions and limitations under the License, including but not limited to 12 * distribution rights of the Software. 13 * 14 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 15 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 16 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE 17 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER 18 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, 19 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE 20 * SOFTWARE. 21 */ 22 23 package com.liferay.portal.velocity; 24 25 import com.liferay.portal.kernel.util.Validator; 26 27 import java.io.StringWriter; 28 29 import java.util.Iterator; 30 import java.util.Map; 31 32 import org.apache.velocity.VelocityContext; 33 import org.apache.velocity.app.Velocity; 34 35 /** 36 * <a href="VelocityUtil.java.html"><b><i>View Source</i></b></a> 37 * 38 * @author Brian Wing Shun Chan 39 */ 40 public class VelocityUtil { 41 42 public static String evaluate(String input) throws Exception { 43 return evaluate(input, null); 44 } 45 46 public static String evaluate(String input, Map<String, Object> variables) 47 throws Exception { 48 49 Velocity.init(); 50 51 VelocityContext vc = new VelocityContext(); 52 53 if (variables != null) { 54 Iterator<Map.Entry<String, Object>> itr = 55 variables.entrySet().iterator(); 56 57 while (itr.hasNext()) { 58 Map.Entry<String, Object> entry = itr.next(); 59 60 String key = entry.getKey(); 61 Object value = entry.getValue(); 62 63 if (Validator.isNotNull(key)) { 64 vc.put(key, value); 65 } 66 } 67 } 68 69 StringWriter output = new StringWriter(); 70 71 Velocity.evaluate(vc, output, VelocityUtil.class.getName(), input); 72 73 return output.toString(); 74 } 75 76 }